158 lines
3.6 KiB
C
158 lines
3.6 KiB
C
/*
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* dice_midi.c - a part of driver for Dice based devices
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*
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* Copyright (c) 2014 Takashi Sakamoto
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include "dice.h"
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static int midi_open(struct snd_rawmidi_substream *substream)
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{
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struct snd_dice *dice = substream->rmidi->private_data;
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int err;
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err = snd_dice_stream_lock_try(dice);
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if (err < 0)
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return err;
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mutex_lock(&dice->mutex);
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dice->substreams_counter++;
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err = snd_dice_stream_start_duplex(dice, 0);
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mutex_unlock(&dice->mutex);
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if (err < 0)
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snd_dice_stream_lock_release(dice);
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return err;
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}
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static int midi_close(struct snd_rawmidi_substream *substream)
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{
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struct snd_dice *dice = substream->rmidi->private_data;
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mutex_lock(&dice->mutex);
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dice->substreams_counter--;
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snd_dice_stream_stop_duplex(dice);
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mutex_unlock(&dice->mutex);
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snd_dice_stream_lock_release(dice);
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return 0;
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}
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static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
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{
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struct snd_dice *dice = substrm->rmidi->private_data;
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unsigned long flags;
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spin_lock_irqsave(&dice->lock, flags);
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if (up)
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amdtp_am824_midi_trigger(&dice->tx_stream[0],
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substrm->number, substrm);
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else
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amdtp_am824_midi_trigger(&dice->tx_stream[0],
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substrm->number, NULL);
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spin_unlock_irqrestore(&dice->lock, flags);
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}
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static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
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{
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struct snd_dice *dice = substrm->rmidi->private_data;
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unsigned long flags;
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spin_lock_irqsave(&dice->lock, flags);
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if (up)
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amdtp_am824_midi_trigger(&dice->rx_stream[0],
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substrm->number, substrm);
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else
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amdtp_am824_midi_trigger(&dice->rx_stream[0],
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substrm->number, NULL);
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spin_unlock_irqrestore(&dice->lock, flags);
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}
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static void set_midi_substream_names(struct snd_dice *dice,
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struct snd_rawmidi_str *str)
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{
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struct snd_rawmidi_substream *subs;
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list_for_each_entry(subs, &str->substreams, list) {
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snprintf(subs->name, sizeof(subs->name),
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"%s MIDI %d", dice->card->shortname, subs->number + 1);
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}
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}
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int snd_dice_create_midi(struct snd_dice *dice)
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{
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static const struct snd_rawmidi_ops capture_ops = {
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.open = midi_open,
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.close = midi_close,
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.trigger = midi_capture_trigger,
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};
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static const struct snd_rawmidi_ops playback_ops = {
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.open = midi_open,
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.close = midi_close,
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.trigger = midi_playback_trigger,
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};
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struct snd_rawmidi *rmidi;
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struct snd_rawmidi_str *str;
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unsigned int midi_in_ports, midi_out_ports;
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int i;
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int err;
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midi_in_ports = 0;
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midi_out_ports = 0;
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for (i = 0; i < MAX_STREAMS; ++i) {
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midi_in_ports = max(midi_in_ports, dice->tx_midi_ports[i]);
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midi_out_ports = max(midi_out_ports, dice->rx_midi_ports[i]);
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}
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if (midi_in_ports + midi_out_ports == 0)
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return 0;
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/* create midi ports */
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err = snd_rawmidi_new(dice->card, dice->card->driver, 0,
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midi_out_ports, midi_in_ports,
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&rmidi);
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if (err < 0)
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return err;
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snprintf(rmidi->name, sizeof(rmidi->name),
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"%s MIDI", dice->card->shortname);
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rmidi->private_data = dice;
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if (midi_in_ports > 0) {
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
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&capture_ops);
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str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
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set_midi_substream_names(dice, str);
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}
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if (midi_out_ports > 0) {
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
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&playback_ops);
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str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
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set_midi_substream_names(dice, str);
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}
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if ((midi_out_ports > 0) && (midi_in_ports > 0))
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
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return 0;
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}
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